checkpoint; builds again

src/ir/strings.rs

@@ -1,8 +1,8 @@
-use super::ast::{Expression, Program, Statement, TopLevel};
+use super::ast::{Expression, Program, TopLevel};
 use internment::ArcIntern;
 use std::collections::HashSet;
 
-impl Program {
+impl<T> Program<T> {
     /// Get the complete list of strings used within the program.
     ///
     /// For the purposes of this function, strings are the variables used in
@@ -18,37 +18,18 @@ impl Program {
     }
 }
 
-impl TopLevel {
+impl<T> TopLevel<T> {
     fn register_strings(&self, string_set: &mut HashSet<ArcIntern<String>>) {
         match self {
-            TopLevel::Function(_, _, stmts, body) => {
-                for stmt in stmts.iter() {
-                    stmt.register_strings(string_set);
-                }
-                body.register_strings(string_set);
-            }
+            TopLevel::Function(_, _, _, body) => body.register_strings(string_set),
             TopLevel::Statement(stmt) => stmt.register_strings(string_set),
         }
     }
 }
 
-impl Statement {
-    fn register_strings(&self, string_set: &mut HashSet<ArcIntern<String>>) {
-        match self {
-            Statement::Binding(_, name, _, expr) => {
-                string_set.insert(name.clone());
-                expr.register_strings(string_set);
-            }
-
-            Statement::Print(_, _, name) => {
-                string_set.insert(name.clone());
-            }
-        }
-    }
-}
-
-impl Expression {
+impl<T> Expression<T> {
     fn register_strings(&self, _string_set: &mut HashSet<ArcIntern<String>>) {
         // nothing has a string in here, at the moment
+        unimplemented!()
     }
 }